Corner Brook Long Term Care Facility Sewage Treatment
The long term care facility was constructed in 2009 in Corner Brook, on the west
coast of Newfoundland. It is a Leadership in Environmental and Energy Design
(LEED) Certified project. The Abydoz Engineered Wetland treatment system is
used to treat all the sewage generated at the facility and was instrumental in
acquiring LEED points for the overall project.
Design
Population of facility: Approx. 400 staff and patients = 50 - 90 students and visitors per day
Average Flow: 78 m3/day
Wetland Treatment Area: 2,740 m2
Inlet Concentration:
150-200 mg/L BOD
200 mg/L TSS
Outlet Concentration (Tertiary Treatment Standards):
10 mg/L BOD
10 mg/L TSS
Process Description
The wetland system is comprised of two horizontal flow wetland beds designed to
provide treatment in parallel or in series. The first bed is a bilateral horizontal
bed, such that its inlet is in the center of the bed and flow moves outward to both
sides, bilaterally.
The second bed is a standard horizontal bed with an inlet on one side and an
outlet on the other. The flow moves across the bed in a consistent direction from
inlet to outlet. Both beds have a specialized blended Abydoz matrix and are
planted with Abydoz nursery wetland plants.
In regular operations both beds will operate in parallel mode. The system can
also operate in series-mode to increase levels of treatment.
Actual Treatment Results (not yet fully established):
BOD: 500-600 mg/L reduced to 30-50 mg/L
TSS: 350-400 mg/L reduced to 40 mg/L
Total Project Cost
$700,000
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